263972213 has 4 divisors (see below), whose sum is σ = 264078720. Its totient is φ = 263865708.

The previous prime is 263972201. The next prime is 263972231. The reversal of 263972213 is 312279362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263972213 - 2⁸ = 263971957 is a prime.

It is a super-2 number, since 2×263972213² = 139362658472234738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263972113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49445 + ... + 54522.

It is an arithmetic number, because the mean of its divisors is an integer number (66019680).

Almost surely, 2^263972213 is an apocalyptic number.

It is an amenable number.

263972213 is a deficient number, since it is larger than the sum of its proper divisors (106507).

263972213 is a wasteful number, since it uses less digits than its factorization.

263972213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106506.

The product of its digits is 27216, while the sum is 35.

The square root of 263972213 is about 16247.2217009555. The cubic root of 263972213 is about 641.4843582003.

The spelling of 263972213 in words is "two hundred sixty-three million, nine hundred seventy-two thousand, two hundred thirteen".